Oyviny 7 Way Blade 4 Pin Trailer Light Circuit Tester with LED Indicators 6 Function Light Tester for RV Truck Trailer Socket Tester

2 in 1 Design This trailer light tester combines both 4 way circuit tester and 7 way trailer light tester allows you to test both the 4 pin and the 7 blade connectors Easy and quick to test trailer circuits on most trucks 6 Light Functions Versatile trailer wiring tester can be used to test 6 separate trailer light functions quickly confirm the functionality of taillights brake lights reverse lights turn signals electric trailer brakes and 12V auxiliary power on your vehicle Bright LED Indicators Plug in 4 way and 7 way trailer light tester equips a LED light for each electrical function Plugging the light tester and check you can easily read the green LEDs and find out which wiring has a problem Durable Construction For longlasting use this 7 blade RV trailer tester is made from durable ABS plastic which will never rust or corrode TinPlated copper terminals makes great conductivity Simple to Use No batteries or wiring needed 7 Blade 4 Pin Tester is easy to use ergonomic design is convenient for plugging in or unplugging Widely used to test trailer light circuits on most Trucks Boats Trailers Campers Caravans Food Vans and other Towed Vehicles Note 1 The trailer tester will upside down when testing for 2017 Newer FordGMCChevy model Note 2 7 pin trailer plug tester is unable to test LED lighting system Note 3 Doesnt work with vehicle has a lampout sensor such as BMW VW Audi MercedesBenz Porsche etc